Gas-engine.



Patented Sept. 12, 1911. l

S. J. WEBB.

GAS ENGINE. APrLIoATIol FILED 00T. ao, 1902.

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UNrrnD sirATEs PATENT oiuaicn` SAMUEL J. WEBB, OF MINDEN, LOUISIANA.

GAS-ENGINE.

Specification of Letters Patent.

Application filed Uetober 80, 1902.

Patented Sept. 12, 1911. Serial No. 129,429.

elevation of the engine illustrating my .im-,

provement.

The cylinder A has a piston 1 connected to the crank pin 2 extending between the fly wheels 3, 3, on the shaft 4 the latter passing through bearings in a casing B. rlhe air inlet pipe 64, communicateswith a chainber a: in a casing C, which chamber is separated by a partition 5 from a chamber g/ with which communicates the oil inlety pipe 6, and a valve stem .7 carries two valves S, 9, the former closing a port l() in the partition .5 and the latter a port 12 communicating with the oil pipe, the oil being` sprayed by the air current usual. The valve stem slides longitudinally through a suitable packing box. The two ports 1.0, 12 are of the proper relative size to permit the flow of the proper relative proportions of oil and air and this is maintained under all variations of iiow by making the two valves S, 9 of the same length, but of such determined diiferent diameters, that when the valves are moving together the two ports will be opened or closed to the same proportionate extent. This avoids the necessity of any adjustable means for regulating the proportions of the gases in the mixture. As it is sometimes desirable to vary the proportion of air to that of oil, I provide an air inlet port to the chamber y controlling it by a valve 56. A check valve 13 prevents back pressure against the oil supply and back pressure against the air valve is prevented by a valve 14 closing upward against a port 15 at the bottom of the casing C, a spring 1G keeping the valve 14 normally closed. The valve 13 has another function, to wit, to prevent the inflow ofoil when the valve 14 is closed and when there is no reduced pressure in the valve casing C. If the port 12 was continuously open to the extent permitted by the adjustment of its valve, then upon the closing of the valve 14 or when there was no pressure in the valve casing C,

the oil would flow freely upward through the.

said port and into the casing and accumulate therein to a detrimental extent.4 'The valve .l tends t remain by its weight in position to close the outlet from the oil inlet tube 6, the oil pressure being very slight in any ase, and the oil therefore will not flow into the valve casing except when pressure therein is reduced and it is required to draw both air and oil into the casing.

The exhaust valve 72 is operated from valve shaft 27 operated from the crank shaft by a two to one gearing. The exhaust passes through pipe 28 to a casing D surrounding air pipe G-l and hence to exhaust pipe 24. The combustible charge is ignited by an igniter E in a easing I? which communicates with the cylinder.

It will be seen that by shifting the valve stem 7, the two valves may be simultaneously set preserving the relative proportions of gas and air in any position as above fdescribed and further that by setting the stem downward to a proper extent each valve may be closed against its seat so that the inlet of both gas and air is absolutely cut off. In such case, the engine will run without any supply whatever. As a result, when the engine is moving forward by momentui-n, or toasting without any'charge, there is no gas within the cylinder to be compressed on the backward movement of the piston, and there is much less resistance to the operation of the engine (even taking into consideration the vacuum resulting from closing the ports) than is the case where air is admitted when there is to be no explosion, which air has to, be compressed at each stroke of the engine;

Without limiting myself to the construction shown, I claim 1. The combination'with a gas engine, of a casing having air and oil inlet parts of determined relative size and a valve stem carrying valves differently formed whereby the relation of size is preserved at all-positions of the valves, and an air port 55 and valve 56, substantially asset forth.

2. The combination in a gas engine, of a casing having air and fuel inlet ports, valves name t0 this specification in the presence of for said ports, said valves being formed and two subscri bing Witnesses. constructed so that the port relations are preserved at all positions of the valves, and SAMUEL J WEBB' 5 a single stem for said Valves, said casing be- Witnesses:

ing provided with an auxiliary air inlet. H. W. GILLMAN, Jr.,v In testimony whereof I have signed my. W. CLARENCE DUVALL. 

